Role of Malignant Hyperthermia Domain in the Regulation of Ca2+ Release Channel (Ryanodine Receptor) of Skeletal Muscle Sarcoplasmic Reticulum*

Role of Malignant Hyperthermia Domain in the Regulation of Ca2+ Release Channel (Ryanodine Receptor) of Skeletal Muscle Sarcoplasmic Reticulum*
复制标题

恶性高热域在骨骼肌肌浆网 Ca2 释放通道(兰尼碱受体)调节中的作用*

DOI:
--
复制
发表时间:
1996
影响因子:
4.8
通讯作者:
M. Ronjat
M. Ronjat
中科院分区:
生物学2区
文献类型:
--
作者:
F. Zorzato;P. Menegazzi;S. Treves;M. Ronjat

文献摘要

参考文献

被引文献

相似文献

包含骨骼肌兰尼碱受体的Gly 341的融合蛋白被用于产生单克隆抗体;表位作图表明单克隆抗体419(mAb 419)与Gly 341上游几个残基的序列反应。然后将mAb 419用于探测兰尼碱受体(Ryanodine receptor,RYR)功能。我们的结果表明,在用mAb 419孵育三联体囊泡后,在pCa 8下的Ca 2+诱导的Ca 2+释放速率增加。不同[Ca 2 +]条件下[3 H]ryanodine结合的平衡评价表明,mAb 419将刺激ryanodine结合的半最大[Ca 2 +]移至较低值(0.1 μ M vs 1.2 μM)。这种功能效应可能是由于抗体对RYR的Ca 2+结合结构域的直接作用,或者是由于抗体对RYR的免疫阳性区域和调节结构域之间的分子内相互作用的干扰。使用光学生物传感器BIAcore(Pharmacia Biotech Inc.)直接测试后一种假设:我们表明免疫阳性RYR多肽能够与天然RYR复合物相互作用。与免疫阳性地高辛-RYR融合蛋白的配体重叠表明,这种相互作用可能与钙调蛋白结合结构域(由残基3010-3225定义)和由残基799-1172定义的多肽发生。总之,我们的研究结果表明,由单克隆抗体419的RYR通道活性的刺激是由于扰动的免疫阳性多肽和钙调节位点可能对应于钙调蛋白结合域之间的分子内相互作用。
A fusion protein encompassing Gly341 of the skeletal muscle ryanodine receptor was used to raise monoclonal antibodies; epitope mapping demonstrates that monoclonal antibody 419 (mAb419) reacts with a sequence a few residues upstream from Gly341. The mAb419 was then used to probe ryanodine receptor (RYR) functions. Our results show that upon incubation of triads vesicles with mAb419 the Ca2+-induced Ca2+ release rate at pCa 8 was increased. Equilibrium evaluation of [3H]ryanodine binding at different [Ca2+] indicates that mAb419 shifted the half-maximal [Ca2+] for stimulation of ryanodine binding to lower value (0.1 versus 1.2 μM). Such functional effects may be due to a direct action of the Ab on the Ca2+ binding domain of the RYR or to the perturbation by the Ab of the intramolecular interaction between the immunopositive region and regulatory domain of the RYR. The latter hypothesis was tested directly using the optical biosensor BIAcore (Pharmacia Biotech Inc.): we show that the immunopositive RYR polypeptide is able to interact with the native RYR complex. Ligand overlays with immunopositive digoxigenin-RYR fusion protein indicate that such an interaction might occur with a calmodulin binding domain (defined by residues 3010-3225) and with a polypeptide defined by residues 799-1172. In conclusion our results suggest that the stimulation by the mAb419 of the RYR channel activity is due to the perturbation of an intramolecular interaction between the immunopositive polypeptide and a Ca2+ regulatory site probably corresponding to a calmodulin binding domain.
DOI: 10.1016/s0021-9258(19)75701-9
发表时间: 1987-02
期刊: The Journal of biological chemistry
影响因子: --
作者:
M. Inui;A. Saito;S. Fleischer
通讯作者: M. Inui;A. Saito;S. Fleischer
用于构建trpE融合基因的具有多个克隆位点的高表达载体:pATH载体。
DOI: 10.1016/0076-6879(91)94036-c
发表时间: 1991
影响因子: --
作者:
Koerner,TJ;Hill,JE;Myers,AM;Tzagoloff,A
通讯作者: Tzagoloff,A
电子探针 X 射线微量分析强直后 Ca2 和 Mg2 在原位肌浆网的运动。
DOI: --
发表时间: 1985
期刊: The Journal of biological chemistry
影响因子: --
作者:
Somlyo,AV;McClellan,G;Gonzalez-Serratos,H;Somlyo,AP
通讯作者: Somlyo,AP
DOI: 10.1016/j.neuroscience.2012.11.055
发表时间: 2013-02-12
期刊: Neuroscience
影响因子: 3.3
作者:
Duncan C;Mueller S;Simon E;Renger JJ;Uebele VN;Hogan QH;Wu HE
通讯作者: Wu HE
使用重组 DNA 解剖结核分枝杆菌抗原。
DOI: 10.1073/pnas.82.9.2583
发表时间: 1985
影响因子: 11.1
作者:
Young,RA;Bloom,BR;Grosskinsky,CM;Ivanyi,J;Thomas,D;Davis,RW
通讯作者: Davis,RW